diff --git a/core/action/action.go b/core/action/action.go
index 8b04d0c..206ecb8 100644
--- a/core/action/action.go
+++ b/core/action/action.go
@@ -21,13 +21,14 @@ func (spec *baseSpec) Receivers() []lib.Addressable {
 	return spec.receivers
 }
 
-func (spec *baseSpec) AddReceiver(rcv lib.Addressable) {
+func (spec *baseSpec) AddReceiver(rcv lib.Addressable) lib.ActionSpec {
 	for _, r := range spec.receivers {
 		if r == rcv {
-			return
+			return spec
 		}
 	}
 	spec.receivers = append(spec.receivers, rcv)
+	return spec
 }
 
 func Base(hdlr lib.ActionHandler, rcvs ...string) *baseSpec {
@@ -38,10 +39,6 @@ func Base(hdlr lib.ActionHandler, rcvs ...string) *baseSpec {
 	return &spec
 }
 
-func BaseA(hdlr lib.ActionHandler, rcvs ...lib.Addressable) *baseSpec {
-	return &baseSpec{hdlr, rcvs}
-}
-
 // action selection
 
 func Select(ctx lib.Context, msg lib.Message) []lib.Action {
diff --git a/matrix/matrix.go b/matrix/matrix.go
index 9752516..335953d 100644
--- a/matrix/matrix.go
+++ b/matrix/matrix.go
@@ -40,7 +40,7 @@ func connect(src, tgt lib.Context, msg lib.Message) {
 			}
 		}
 	}
-	cfg.AddAction(pattern, action.BaseA(handle, tgt))
+	cfg.AddAction(pattern, action.Base(handle).AddReceiver(tgt))
 }
 
 func handle(act lib.Action) bool {
diff --git a/scopes.go b/scopes.go
index ebf708d..315fb66 100644
--- a/scopes.go
+++ b/scopes.go
@@ -83,7 +83,7 @@ type Action interface {
 type ActionSpec interface {
 	Handler() ActionHandler
 	Receivers() []Addressable
-	AddReceiver(Addressable)
+	AddReceiver(Addressable) ActionSpec
 }
 
 // procedures and handlers